1. E Fermi, Attempt at a Theory of β-rays, Il Nuovo Cimento, Vol.11, p.1, 1934; Zeitschrift fur Physik, Vol.88, p.161, 1934.
2. For Fermi’s article in English, see The Development of Weak Interaction Theory, Edited by P K Kabir, Gordon and Breach Science Publishers, 1963. This volume contains most of the original papers in weak interaction physics upto 1962.
3. A Pais, Inward Bound, Oxford University Press, New York, p.417–418, 1986.
4. G Rajasekaran, Standard Model, Higgs Boson and What Next?, Resonance, Vol.17, No.10, p.956, 2012.
5. G Rajasekaran, Cabibbo Angle and Universality of Weak Interactions, Physics News, July 2011, p.21.